Improvement in machines for sewing hose



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IEX/BRETT P. RICHARDSON, OF LA'WRENCE, MASSACHUSETTS.

IMPROVEMENT IN MACHINES FOR SEWlNG HOSE.

Specification forming part of Letters Patent No. 146,948, dated January 27, 1874; application iiled December 19, 1873.

To all whom fit may concern:

Be it known that I, EVERETT P. RICHARD- SON, of Lawrence,in the county of Essex and State of Massachusetts, have invented an Improved Machine t'or Sewing Hose 5 and I do hereby declare that the following, taken in connection with the drawings which accompany and form part of this specification, is a description of my invention sut'cient to enable those skilled in the art to practice it.

The invention relates particularly to the manufacture of hydraulic hose from woven material by taking a strip of duck, canvas, or other suitable cloth, and unit-ing its opposite edges by sewing to-form atube, the strip being changed from lat to tubular form as it passes into the machine for the action of the stitch-forming mechanism. A

In lthe present invention, relating to such manufacture, the needle and presser-foot are placed above the work-support, the needle being preferably a hook orcrochet-needle having a suitable cast-oit'. The worksupport consists in a long horizontal arm,.the front end of which is directly under or in vertical line with the needle, the end of the arm containing a rotary threadguide, which, by suitable lever and link connections, is rotative] y reciprocated from the driving-shaft, so as to lay the thread at propertimes-in the path of movement of the needle, to be caught by the hook thereof as the needle rises. Under and around this arm extends a guide, which, at its rear end, inrearof the arm, is flat or slightly concave, changing from this ilat to tubular form as it passes under the arm and to thc front end thereof, this device forming a guide for bringing the strip from ilat into tubular form, with the edges lapped, presenting the edges in lapped position upon the front end ot' the arm and under the needle, and in position to be united by the stitch-forming mechanism. rlhe arm and guide extend from the line of the needle in one direction, and on the opposite side from them are two feed wheels, between which the sewed hose passes, the axes of the wheels being horizontal, and the tube passing between them in a lat or collapsed form. These wheels have a positive intermittent rotative movement, they being preferably geared another form the tube is made with a welt,

together, and one havin g attached to it, or upon the same shaft to which it is iixed, a ratchetwheel,with the teeth ot' which engages a pawl, this pawl being jointed to a rocker-lever, which, by a suitable link and lever connection, is actuated from the driving-shaft.

The simplest form of hose made by this machine is a tube formed from a uniformly-wide strip of woven material, having its edges lapped and united by a single row of stitches. Another form of the tube differs from this simply in having two or more rows of stitches,

y the machine being made with two sets of stitchforming mechanism to make such tube. In

the welt being first stitched to one edge ofthe strip bya common wax-thread sewing-machine, and the opposite edge being entered between the welt and the iirst edge, and the three edges being then united, to form the tube, upon the hose-machine. In another form of the tube the edges are lappedland united upon a common sewing-machine by making a fold at the lap, and ruiming a line of stitches just far enough back to take the four thicknesses. p Two or more such seams may be made; and in connection with such a seam there may-be an f additional seam made by the special mechanism described, or the strip may have its edges bent as they pass through the former, so that the edges will hook together; or the edges may be united upon a common sewing-machine, and the strip turned after such union is eftected. The woven strips may be coated4 upon one surface with caoutchouc compound or other impervlous composition, such surface being presented inwardly to form the tube 5 Ior the tube maybe coated after it has been sewed.

rlhe invention consists in the organization generally described, for forming a iiat woven strip into a tube with the edges united by stitches.

The drawing represents, in Figures l to 6,

f inclusive, the mechanism for forming the sewed hose.

. Figure l shows the machine in plan. Fig.

is a front elevation ot' it. Fig. is an end elevation. Fig'. 4 is a cross-section of the arm and guide on li'nc x a'. Fig. 5 is a cross-section of the arm, showin g the whirl in full size. Fig. 6 is a section of the end of the work-supporting arm, showing the whirl in plan.

a denotes a bedplate, from which rise uprights b, in which is journaled the drivingshaft c. The bed-plate is mounted upon a suitable pillar or post, and upon one side of it it has an'arm or extension, e, to which lis at taehed a slide, f, that carries the work-supporting arm g, in the front end of which is the reciprocating or rotating whirl or thread-guide l1. The object of slide f is to enable the arm g to be drawn back 'for access to the whirl, Src. From the front upright b extend arms z', in which are the bearings for the verticallyreeiprocating needle-bar la and presser-foot l. The needle m is a hook-needle, and has,work ing in conjunction with it, the ordinary hookneedle cast-offj extending from abar, n. The needle-bar is connected, by a link, o, to an eccentric crank-pin, p, on the shaft c, and the cast-oit' is operated by a linger, g, extending from the link o, and a spring, r. rlhe bar s of the presser-foot l is operated by a cam, t, on the driving-shaft, through the intervention of a lever, a, and a spring, o, the cam lt eifecting the rise of the presser-foot, and the spring throwing it down, the presserfoot being vat all times in contact with the work, except when raised by the cam projection, at which rise'the feed of the work is effected. The needle castotf, presser-foot, and threadguide perform their functions in the formation of a stitch in the usual manner, the invention, so far as they are concerned, relating only to their arrangement. Then the hook of the needle has passed through the work and entered the arm g, it passes through the eye or center w of the whirl, and then the whirl is moved rotatively to throw the thread, running through the thread-eye m, around, or partially around, the .needle-shank, so that, as the needle rises, the thread will enter the hook, and be drawn up with the needle.

The movement of the whirl is eifected as follows: Extending through the arm g is a slide-bar, y, having at 011e end gear-teeth z, meshing into teeth on the periphery of the whirl, this slide-bar being jointed to the foot of an arm, a?, extending from one end of a rocker-shaft, b2, at whose opposite end is an arm, c2, connected by a hooked link, d2, with a vertical lever, e2, from whose upper arm a pin extends into the groove of a cam-wheel, f2, on llie driving-shaft. The link cl2 is so jointed to the leverarm cl as to disconnect therefrom by raising the link., such disconnection enabling the arm y to be drawn back for inspection of the whirl or introduction of the thread, the thread running from the spool under the arm through a hole, g2, and thence through the whirl and out through the top of the arm. The link d2 and arm c2 are held iny connection by a spring, which spring yields for their disconnection when the link is raised,aud permits the joint-pin m2 to leave the slot Under and around the arm g extends the workguide h2. This guide is a long plate, curved transversely, and changing in form from a shallow convex upper surface at its outer end to a tubular form at its opposite end. Into its outer end enters the end of the strip to be formed into a hose, the strip passing under a guide, i?. As the strip passes from this guide it is gradually and uniformly bent, and at the opposite end of the guide it emerges bent into tubular form,with one edge lapping the other, and the lapped edges, as they emerge, resting upon the arm g, the end of the guide being close to the eye or hole in the top of the arm through which the needle enters. Thus, as the lapped edges emerge from the guide they are united by the stitch-forming mechanism. At the end of the guide one edge of the strip may abut against a shoulder formed on the guide, the other edge lapping over it, and a short distance back the guide may have plates k2 made with internal guide-lips lz for guiding the respective opposite edges of the strip.

The work is brought to the action of the stitch-forming mechanism as follows: At one end of the bed-plate are bearings for supporting two shafts, o2 p2, the bearings of the lower shaft p2 being stationary, and those of the upper shaft movable. These shafts are geared together at their rear ends, and at their front ends are feedwheels q2 r2. These wheels are made as ratchet-wheels, and the bottom wheel has direct intermittent rotative movement imparted to it as follows: Upon the shaft p2 is hung a paWl-lever, s2, having jointed to its vertical arm a pawl, t2, which engages with the teeth of the `ratchet and feed wheel r3. The other and horizontal arm of the lever has jointed to it avertical link, u2, connected at its upper end to one arm of a lever, o2, from Whose other arm a pin extends into the groove of a cam-wheel, wz, on the driving-shaft c, the intermittent outward movement of the lever arm by the cam imparting through its connections with the pawl the intermittent forward or feed movements of the pawl and of the feed-wheel with which the pawl engages. As the shafts are geared together the rotative movement of the lower shaft drives the upper one, so that both feed-wheels move together. The sewed tube is drawn through or between these feed-rolls in a flat or collapsed form, and by their action they impart the requisite feed, such feed acting in conj unction with the needle, whirl, 85e., to form the continuous succession of stitches to form the tube. As the stitches form a ridge upon the top of the sewed tube the upper roll may be grooved, as seen at'Fig. 3, to receive such ridge. The respective movements of the various parts of the mechanism are timed, so that when the needle descends the work is at rest, held by the presser-foot, the feed-wheels being stationary; and, after the needle has risen, the presser-foot rises and releases the work, and the feed-wheels then rotate and effect the forward movement of the work. The guide h2 is attached to the ina-chine by pivots y2, and for forming hose of various sizes series of guides adapted to such sizesare used interchangeably. The cams for effecting the feed of the work, the reciprocation of the whirl-bar, and the movement of the presser b ar, and the crank for actuating the needle-bar, are all located on the same shaft c, and the feed-lever c2, whirl-lever c2, and presser-foot lever a all have their fulcrums upon one shaft, such arrangements of these devices compactiug the mechanism and simplifying the construction.

In forming hose of varying diameter the position of the feed-wheels requires to be changed, and for this purpose I place the bearings of the feed-wheel shaft in a verticallyadjustable frame, a3, fastened to the frame a bv screws b3 Jassin 0 through slots c3 and nuts d3. By means of the slots, screws, and nuts, the frame may be positioned at any suitable height with reference to the work-support and the guide h2. The crank-pin p is made as an eccentric, or is fastened to the cam-wheel t by a pin, e3, extending` eccentrically from the crank-pin, the throw of the needle being adjustably changed by turning thc crank-pin p.

Y I claiml. In combination, with the stitch-forming mechanism, the horizontal work-supporting and whirl-containing arm g, fastened to the slide f, and the guide-plate h2, substantially as shown and described.

2. In combination, with the arm g and its whirl, the slide-bar y, reciprocated to actuate the whirl by means of the rocker-shaft b2 and its arms a2 c2, and the detachable hooked link d2, lever c2, and cam f2, substantially as de scribed.

3. The guide-plate h2, formed as described, and pivoted at y2, substantially as shown and described,in combination with the arm g fastJ cned to the slide. l

4. In combination with the arm g, guide h2, and the stitch-forming mechanism, the feed- Wheels q2 r2, arranged and operated substantially as shown and described.

5. The vertically-adjustable frame a3, for supporting the feed-wheel shafts, and permitting adjustment of the feed-wheels with refeiw ence to the work-support.

EVERETT r. RICHARDSON.

Witnesses FnANcrs GoULn, M. W. Fuori-unanimi. 

